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Qian-Wen Guo

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#natural language process... Jun 2026

An Embarrassingly Simple Detector for Model Extraction Attacks in Large Language Model API Traffic

This work forms model extraction monitoring as benign-calibrated traffic-window distribution testing: embed incoming queries into a semantic space and test whether their aggregate distribution deviates from historical benign traffic.

Shu-Ze Liu, Qian-Wen Guo, Yushun Dong · arXiv.org · 1 citation